CVE-2026-14180

Undertow-core: undertow:http request smuggling via oversized chunk-size bit overlap

MEDIUM

5.3

CVSS Score

Published: August 11, 2026 at 03:32 PM UTC

Updated: October 20, 2026 at 03:17 PM UTC

8 products affected across 1 vendorJBoss Enterprise Application PlatformEnterprise LinuxSingle Sign on

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Severity

MEDIUM5.3

Exploit prediction

EPSS 1%

SSVC

No known exploit

Description

A flaw was found in the ChunkReader component of the Undertow HTTP server, which is used by WildFly and JBoss EAP to handle chunked transfer encoding. The issue occurs because the parser uses a single internal variable to store both the remaining chunk size and state flags. By sending a specially crafted request with an extremely large chunk size, an attacker can cause these values to overlap, tricking the parser into thinking a request has finished prematurely. This can allow a second, "smuggled" request to be processed out of sync, potentially bypassing security controls.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

JBoss Enterprise Application Platform · Red Hatrpm

92%

All versions7

Vendor states this is fixed in 0:1.1.9-1.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:1.1.9-1.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:1.1.9-1.redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:1.2.7-1.redhat_00002.1.el10eap (unaffected)

Vendor states this is fixed in 0:1.2.7-1.redhat_00002.1.el8eap (unaffected)

Vendor states this is fixed in 0:1.2.7-1.redhat_00002.1.el9eap (unaffected)

Vendor states this is fixed in 0:1.85.0-1.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:1.85.0-1.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:1.85.0-1.redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.0.18-1.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.0.18-1.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.0.18-1.redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.0.5-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.0.5-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.0.5-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.1.0-1.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.1.0-1.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.1.0-1.redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.18.9-1.redhat_00003.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.18.9-1.redhat_00003.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.18.9-1.redhat_00003.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.2.0-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.2.0-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.2.0-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.25.4-1.redhat_00003.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.25.4-1.redhat_00003.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.25.4-1.redhat_00003.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.3.2-1.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.3.2-1.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.3.2-1.redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.3.26-2.SP3_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.3.26-2.SP3_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.3.26-2.SP3_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.40.0-8.redhat_00024.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.40.0-8.redhat_00024.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.40.0-8.redhat_00024.1.el9eap (unaffected)

Vendor states this is fixed in 0:2.6.11-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:2.6.11-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:2.6.11-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:3.0.1-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:3.0.1-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:3.0.1-1.Final_redhat_00001.1el9eap (unaffected)

Vendor states this is fixed in 0:3.0.22-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:3.0.22-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:3.0.22-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:3.0.6-1.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:3.0.6-1.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:3.0.6-1.redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:3.1.0-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:3.1.0-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:3.1.0-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:3.2.2-1.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:3.2.2-1.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:3.2.2-1.redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:3.6.3-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:3.6.3-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:3.6.3-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:4.0.11-2.SP1_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:4.0.11-2.SP1_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:4.0.11-2.SP1_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:4.0.5-1.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:4.0.5-1.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:4.0.5-1.redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:4.0.7-4.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:4.0.7-4.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:4.0.7-4.redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:4.1.136-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:4.1.136-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:4.1.136-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:4.1.5-5.redhat_00008.1.el10eap (unaffected)

Vendor states this is fixed in 0:4.1.5-5.redhat_00008.1.el8eap (unaffected)

Vendor states this is fixed in 0:4.1.5-5.redhat_00008.1.el9eap (unaffected)

Vendor states this is fixed in 0:4.1.7-1.SP1_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:4.1.7-1.SP1_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:4.1.7-1.SP1_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:5.0.31-1.SP2_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:5.0.31-1.SP2_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:5.0.31-1.SP2_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:5.1.0-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:5.1.0-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:5.1.0-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:6.6.54-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:6.6.54-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:6.6.54-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:7.4.0-1.Final_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:7.4.0-1.Final_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:7.4.0-1.Final_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:8.1.1-12.GA_redhat_00048.1.el10eap (unaffected)

Vendor states this is fixed in 0:8.1.1-12.GA_redhat_00048.1.el8eap (unaffected)

Vendor states this is fixed in 0:8.1.1-12.GA_redhat_00048.1.el9eap (unaffected)

Vendor states this is fixed in 0:8.1.8-9.GA_redhat_00006.1.el10eap (unaffected)

Vendor states this is fixed in 0:8.1.8-9.GA_redhat_00006.1.el8eap (unaffected)

Vendor states this is fixed in 0:8.1.8-9.GA_redhat_00006.1.el9eap (unaffected)

Vendor states this is fixed in 0:801.8.0-1.GA_redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:801.8.0-1.GA_redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:801.8.0-1.GA_redhat_00001.1.el9eap (unaffected)

Vendor states this is fixed in 0:9.37.4-1.redhat_00001.1.el10eap (unaffected)

Vendor states this is fixed in 0:9.37.4-1.redhat_00001.1.el8eap (unaffected)

Vendor states this is fixed in 0:9.37.4-1.redhat_00001.1.el9eap (unaffected)

Apache Camel for Spring Boot · Red Hatrpm

90%

All versions4

Build of Apache Camel - HawtIO · Red Hatrpm

90%

All versions4

Data Grid · Red Hatrpm

90%

All versions8

Enterprise Linux · Red Hatrpm

90%

All versions10

Fuse · Red Hatrpm

90%

All versions7

JBoss Enterprise Application Platform Expansion Pack · Red Hatrpm

90%

All versions

Single Sign on · Red Hatrpm

90%

All versions7

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

VDB Entryx_refsource_REDHAT

Source: cverecord

https://access.redhat.com/security/cve/CVE-2026-14180

Issue Trackingx_refsource_REDHAT

Source: cverecord

https://bugzilla.redhat.com/show_bug.cgi?id=2494771

Vendor Advisoryx_refsource_REDHAT

Source: cverecord

https://access.redhat.com/errata/RHSA-2026:70228

Vendor Advisoryx_refsource_REDHAT

Source: cverecord

https://access.redhat.com/errata/RHSA-2026:70229

Vendor Advisoryx_refsource_REDHAT

Source: cverecord

https://access.redhat.com/errata/RHSA-2026:70230

Vendor Advisoryx_refsource_REDHAT

Source: cverecord

https://access.redhat.com/errata/RHSA-2026:70277

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMredhat

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusAWAITING ANALYSIS

CWE

CWE-444

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